UPSC Engineering Service Main detailed application form released, here’s how to apply UPSC ESE Main DAF 2020: The form is released on December 24 and will remain available till January 5 till 6 pm at upsc.gov.in and upsconline.nic.in December 24, 2020 4:47:22 pm UPSC ESE Main DAF 2020 available at upsc.gov.in (Express photo by Prem nath Pandey/Representational) The Union Public Service Commission (UPSC) released the detailed application form (DAF) for the Engineering Services Main exam at its official website, upsc.gov.in. The form is released on December 24 and will remain available till January 5 till 6 pm. “All the candidates qualified on the basis of the result of the main or stage-II examination of the Engineering Services Examination, 2020 are requested to fill the Detailed Application Form (DAF),” states the official notice.